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Airlines Fleet Sizes

As of February 2025^[update], Data from Planespotters.net

Delta Airlines fleet
Aircraft	In service	Orders	Historic	Avg. Age	Aircraft Registrations
Airbus A220-100	45	—	—	5.1 Years	Registrations
Airbus A220-300	29	3	—	2.3 Years	Registrations
Airbus A319-100	57	—	—	23.0 Years	Registrations
Airbus A320-200	55	—	14	29.0 Years	Registrations
Airbus A321-200	127	—	—	6.2 Years	Registrations
Airbus A321neo	69	13	—	1.6 Years	Registrations
Airbus A330-200	11	—	—	19.8 Years	Registrations
Airbus A330-300	31	—	—	16.1 Years	Registrations
Airbus A330-900	32	7	—	2.8 Years	Registrations
Airbus A350-900	35	2	—	5.1 Years,	Registrations
Boeing 717-200	80	—	24	23.3 Years	Registrations
Boeing 737-800	77	—	—	22.4 Years	Registrations
Boeing 737-900ER	163	—	—	9.1 Years	Registrations
Boeing 757-200	98	—	91	27.9 Years	Registrations
Boeing 757-300	16	—	—	22.0 Years	Registrations
Boeing 767-300ER	40	—	—	28.5 Years	Registrations
Boeing 767-400ER	21	—	—	24.1 Years	Registrations

United Airlines fleet
Aircraft	In service	Orders	Historic	Avg. Age	Aircraft Registrations
Airbus A319-100	81	—	19	23.3 Years	TBA
Airbus A320-200	78	—	27	25.4 Years	TBA
Airbus A321neo	31	15	—	0.6 Years	TBA
Boeing 737-700	40	—	13	25.9 Years	TBA
Boeing 737-800	141	—	—	21.0 Years	TBA
Boeing 737-900	12	—	—	22.4 Years	TBA
Boeing 737-900ER	136	—	—	12.1 Years	TBA
Boeing 737 MAX 8	112	4	—	2.3 Years	TBA
Boeing 737 MAX 9	87	10	—	3.2 Years	TBA
Boeing 737 MAX 10	—	16	—	—	—
Boeing 757-200	40	—	99	28.0 Years	TBA
Boeing 757-300	21	—	—	6.9 Years	TBA
Boeing 767-300ER	37	—	3	29.0 Years	TBA
Boeing 767-400ER	16	—	—	23.4 Years	TBA
Boeing 777-200	74	—	8	25.7 Years	TBA
Boeing 777-300ER	22	—	—	7.2 Years	TBA
Boeing 787-8	12	—	—	11.6 Years	TBA
Boeing 787-9	42	7	—	6.7 Years	TBA
Boeing 787-10	21	—	—	4.6 Years	TBA

American Airlines fleet
Aircraft	In service	Orders	Historic	Avg. Age	Aircraft Registrations
Airbus A319-100	133	—	—	20.9 Years	TBA
Airbus A320-200	48	—	20	23.8 Years	TBA
Airbus A321-200	218	—	1	12.5 Years	TBA
Airbus A321neo	83	9	—	4.0 Years	TBA
Boeing 737-800	303	—	2	15.2 Years	TBA
Boeing 737 MAX 8	67	6	‐	4.2 Years	TBA
Boeing 777-200	47	—	—	24.2 Years	TBA
Boeing 777-300ER	20	—	—	11.0 Years	TBA
Boeing 787-8	37	—	—	6.7 Years	TBA
Boeing 787-9	22	11	—	7.3 Years	TBA

Southwest Airlines fleet
Aircraft	In service	Orders	Historic	Avg. Age	Aircraft Registrations
Boeing 737-700	346	—	168	19.0 Years	TBA
Boeing 737-800	204	—	3	9.5 Years	TBA
Boeing 737 MAX 7	—	31	—	—	—
Boeing 737 MAX 8	250	1	—	3.1 Years	TBA

JetBlue Airways fleet
Aircraft	In service	Orders	Historic	Avg. Age
Airbus A220-300	44	—	—	1.6 Years
Airbus A320-200	130	—	12	19.4 Years
Airbus A321-200	63	—	—	8.6 Years
Airbus A321neo	37	3	—	3.2 Years
Embraer ERJ-190	16	—	47	16.0 Years

JetBlue Airways fleet
Aircraft	In service	Orders	Historic	Avg. Age
Airbus A320-200	8	—	20	9.5 Years
Airbus A320neo	82	8	—	5.5 Years
Airbus A321-200	21	—	—	8.3 Years
Airbus A321neo	48	8	—	1.2 Years

Allegiant Air fleet
Aircraft	In service	Orders	Historic	Avg. Age
Airbus A319-100	34	—	4	19.5 Years
Airbus A320-200	88	—	12	14.9 Years
Boeing 737 MAX 8	5	2	—	0.7 Years

Allegiant Air fleet
Aircraft	In service	Orders	Historic	Avg. Age
Boeing 737-700	14	—	8	16.9 Years
Boeing 737-800	61	—	—	16.9 Years
Boeing 737-900	6	—	6	23.3 Years
Boeing 737-900ER	79	—	—	9.0 Years
Boeing 737 MAX 8	5	—	—	0.8 Years
Boeing 737 MAX 9	73	7	1	2.6 Years
Embraer ERJ-175	86	—	—	5.9 Years

Breeze Airways fleet
Aircraft	In service	Orders	Historic	Avg. Age
Airbus A220-300	35	—	—	1.8 Years
Embraer ERJ-190	10	—	—	17.6 Years
Embraer ERJ-195	3	—	4	16.2 Years

FedEx Express fleet
Aircraft	In service	Orders	Historic	Avg. Age
ATR 42-300F	15	—	14	33.2 Years
ATR 72-200F	19	—	2	15.9 Years
ATR 72-600F	23	2	—	15.9 Years
Airbus A300-600RF	65	—	6	29.2 Years
Boeing 737-400F	2	—	8	31.2 Years
Boeing 737-800BCF	8	—	—	19.4 Years
Boeing 757-200SF	87	—	35	32.8 Years
Boeing 767-300F	141	10	4	5.9 Years
Boeing 777F	57	3	—	9.4 Years
Cessna 408 SkyCourier	27	3	—	1.4 Years
McDonnell Douglas MD-11F	27	—	47	31.1 Years

Amazon Prime Air fleet
Aircraft	In service	Orders	Historic	Avg. Age
Airbus A330-300P2F	8	2	—	10.5 Years
Boeing 737-800BCF	30	—	—	22.2 Years
Boeing 767-300F	58	—	1	29.8 Years

Sun Country Airlines fleet
Aircraft	In service	Orders	Historic	Avg. Age
Boeing 737-800	44	29	—	17.7 Years
Boeing 737-900ER	1	4	—	17.5 Years